Hydraulic and earth engineering – Subterranean or submarine pipe or cable laying – retrieving,... – By means advancing along terrain and guiding pipe or cable...
Patent
1987-05-14
1989-06-13
Corbin, David H.
Hydraulic and earth engineering
Subterranean or submarine pipe or cable laying, retrieving,...
By means advancing along terrain and guiding pipe or cable...
405 38, 405179, E02B 1300, E02F 510
Patent
active
048387347
ABSTRACT:
There is provided a method for forming a subterranean fluid permeation control layer in an area of ground. The method comprises the steps of forming a first portion of a trench of a predetermined depth from the surface of the ground and sequentially widening the trench along one side of the previously formed trench while selectively, simultaneously applying a fluid permeation layer substantially along the bottom surface of the previously formed trench and while at least partly covering the layer with earth removed from the widened portion of the trench being formed until the entire area of the ground is covered. The invention also provides a device for carrying out this method.
REFERENCES:
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patent: 3405528 (1986-10-01), Hansen et al.
patent: 3590588 (1971-07-01), Draper
patent: 3618329 (1971-11-01), Hanson
patent: 3874182 (1975-04-01), Potter et al.
patent: 4073152 (1978-02-01), Kishitani et al.
patent: 4379655 (1983-04-01), Brost et al.
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